Importance

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Abstract

Embodiments of the invention are directed to a layered organic light emitting diode (OLED) device comprising a buckled structure that provides an improved light output relative to flat OLED devices. The buckled structure has a fine buckling with a quasi-periodicity of 100 to 700 nm and a gross buckling of 10 to 20 μm. Embodiments of the invention are directed to a method of producing the OLED device comprising a buckled structure, where a transparent substrate is coated with a transparent elastomeric layer, upon which a thin metal layer of 20 to 100 nm is deposited at an elevated temperature. Upon cooling to ambient temperature, the metal layer buckles with the formation of a fine buckling with a quasi-periodicity of 100 to 700 nm and a gross buckling of 10 to 20 μm. The metal layer is oxidized to a transparent metal oxide layer with the retention of the buckling. Subsequent steps comprising deposition of at least an anode layer, an electroluminescence layer, and a cathode layer forms an OLED that has a buckling structure resulting from the buckled metal structure formed upon cooling.

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First Claim